Thermal Stratification and Its Impacts on Water Quality in Shahe Reservoir, Liyang, China

Based on the one-year hourly water temperature profiles and the associated environmental drivers during the past eight years in Shahe Reservoir, Jiangsu Province, China from 2009 to 2016, the factors underlying the seasonal variation of thermal stratification and water quality response were investig...

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Bibliographic Details
Published inHuanjing kexue Vol. 39; no. 6; p. 2632
Main Authors Sun, Xiang, Zhu, Guang-Wei, Da, Wen-Yi, Yu, Mao-Lei, Yang, Wen-Bin, Zhu, Meng-Yuan, Xu, Hai, Guo, Chao-Xuan, Yu, Li, Li, Heng-Peng, Li, Hui-Yun
Format Journal Article
LanguageChinese
Published China 08.06.2018
Subjects
phytoplankton
extreme weather event
eutrophication
thermal stratification
sub-tropical reservoir
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Summary:Based on the one-year hourly water temperature profiles and the associated environmental drivers during the past eight years in Shahe Reservoir, Jiangsu Province, China from 2009 to 2016, the factors underlying the seasonal variation of thermal stratification and water quality response were investigated. It was shown that the thermal stratification was a typical subtropical one-cycle mixing model, lasting from May to September. The thermal stratification appeared and disappeared when the surface water temperature was 21 ℃ in the late spring and 19 ℃ in the middle of autumn. The difference between the water temperature at the epilimnion and hypolimnion increased with increasing solar radiation. When the air temperature was above 30 ℃, the stability of the thermal stratification increased. Heavy storms reduced the temperature of the surface water and weakened the temperature stratification of the column above a 5 m depth but had limited impact on the stratification of the hypolimnion deeper than 5 m. The therma
ISSN:0250-3301
DOI:10.13227/j.hjkx.201710223